Shaping machine for irregular forms



Nov. 13; 1928.- 1,691,429

S. E. BOYNTON SHAPING MACHINE FOR IRREGULAR FORMS Filed NW1?. 1921 5sheets-sheet 1 j? INVENTOR. I l

f l# ATTORNEYS.

Nov. 13, 1928. 1,691,429

v s. E. BoYNToN -HAPING MACHINE' FOR IRREGULAR .FORMS Filed Now-1v. 19215 sheets-sheet 2 N INVENTOR.

2 JATTORNEYS. 'Y

Nov. 13, 1928.

S. E. BOY-NTON SHAPING MACHINE FOR IRREGULAR FORMS Filed Nov. iv. 1921 5Sheets-Sheet t ATTORNEYS.

Nov. 13, 1928. 1,691,429

v s. E. BoYN'roN SHAPING MACHINE FOR IRREGULAR FORMS Filed Nov. 17. 19215 Sheets-Sheet 4 'lNI/ENTOR.

' i l f I ATTORNEY.S.

Patented Nov. 13, 1928, v

UNi'rED srcles PATENT] OFFICE.

STANLEY E. BOYNTON, OF ROCHESTER, NEW YORK, ASSGNOR TO THE CRAWFORD, y,

MCGREGOR AND CANBY COMPANY, OF DAYTON, OHIO, A CORPORAT1ON OFA OHIO.

SHAPNG MACHENE FOR IRREGULAR FORMS.

Application filed November rlhe present invention relates to machinesfor shaping irregular forms, such as shoe lasts, golf clubs or the like,an object of this invention being to provide a machine which has aroughing and a linishing tool, these tools being' relatively movable sothat the roughening worl; will at no time be imposed upon the finishingtool, as is the case, when the linishing tool maintains a fixed relationto the roughing tool to operate it at a point nearer the axis of turningof the block than the roughing tool.r V

To these and other ends, the invention consists of certain parts andcombinations of parts all of which will be hereinafter described, thenovel features being pointed out in the appended claims.

ln the drawings: y

Fig. 1 is an end view of a shaping machine constructed in accordancewith this invention, parts being broken away;

Fig, 2 is a front view of the machine with parts removed; l

.0'. 3 isa plan view with parts removed; 1

4 is a detail view showing the roughing and finishing tracers and aportion of the connections of the roughing tracer with the roughingtool;

li ig. 5 .is a detail view showing in elevation l' the roughing tracerand the rough width grading mechanism;

Fig. 6 is another view in elevation of the ioughing tracer;

7 is a` detail view showing the manner which the roughing tool movesaway from e axis of rotation of the block when operat- 'to produce ahigh spot on the block;

Fig. 8 is a detail view showing the manner in which the roughing toolAmoves relatively to the finishing tool nearer to the axis of ro.- tationof the block in shaping a low spot o the block.

rihere is herein shown one form of shaping` machine in which the presentinvention has been embodied. but it will be distinctly7 understood thatthe invention is notlimited to this type of shaping machine, as thefeature of the invention of producing a relative movement,l between thefinishing and the roughing tool may be embodied in shaping machines ofvarious other types.

ln the illustrated embodiment, 1 indicates the lower port-ion of themain frame and the upper portionof the main frame. The work block andmodel are supported upon a 17, 1921. Serial N0. 515,999

swinging frame, embodying side arms 3, journalled on shafts 4 on theupper portion of the main frame and depending from said shafts, theseside arms being connected by two guide bars 5 and 6, the upper,v guidebar 5 having brace bars 7 secured thereto at 8 and to the side bars 3 at9. The block or work piece 10 is supported from the swinging frame by ablock tail center` 11 anda block driving dog 12, whereas the model issupported from the swinging fra-me by a model tail center 13 and a modeldriving dog 14, the axes of turning of all these four parts beingalined. The tail center 11 is adjustably mounted in a tail stock inwhich it is adjusted by rotation of the usual crank handle, as is commonin lathe construction. The block driving dog is, in this embodiment,mounted to turn in bearings 16, which are provided on two frame pieces17, bolted at their upper and lower ends to the guide bars 5 and 6. Apinion 18 is provided on the shaft of the block driving dog 12 between4the bearings 16, in order to permit the driving dog to be driven in a.manner hereinafter more particularly pointed out. The model tail center13 is mount-ed in a bearing on a slide 19 which is guided on guide bars5 and 6, whereas the driving` dog 14 for the model is mounted on a shaft21 which Vhas Abearings at and 22 in frame pieces boltedV tothe guidebars 5 and 6. A gear wheel 23 between the bearings 2O and 22on the shaft21 meshes with a pinion 24 on a. shaft 25, which has bearing on one ofthe frame pieces 17 and on the frame piece which supports the bearing20;.l

At its end opposite the end on which the pinion 24 is provided, theshaft 25 has a pinion 26 which meshes with the gear 18. It is apparentthat this arrangement provides a driving connection between the shaft 21of the driving dog for the mode] and the shaft of the driving dog forthe block, so that these two parts will turn together about the sameaxis and at the same speed. 'A pulley 27 von the shaft 21 connects by abelt 28 with a pulley 29 on one of the shafts 4, this shaftv also havinga pulley 30 thereon which connects with the pulley 31 on the shaft 32journalled at the rear of the frame 2 and driven in any suitable manner,so that motion may be transmitted to the model and the block for anyposition of adjustmentof the swinging frame which th ese parts aremounted. For cooperation with the modeltwo tracers 33 and 34 may beprovided, the former being what is termed a finishing tracer and thelatter being what is termed a roughing tracer. For cooperation with theblock, two tools in the form of cutters y35 and 36 are provided, theformer being What is termed a finishing tool, and the latter being Whatis termed a roughing tool.

The finishing tool or cutter 35 is, in this instance, in the form of aplurality ot' cutting blades mounted to turn about an axis which is atan oblique angle to the axis otturning of the block. In this instance,the iinishing cutter is mounted on the shaft 37 ot an electric motor38,'vvhich is in turn mounted on a carriage 39 guided on the top ot theframe part l on guides 40 to move parallel to the axis ot turning of theblock.

The carriage 39 may be moved in any suitable manner but, in thisinstance, it is provided With a rack 67 on its under side With which agear Wheel 68 meshes. rlhis gear wheel in turn is driven by a Worm Wheel69 on a shaft 70 on which the gear Wheel G8 is mounted. A Worm 7l on ashaft 72 meshes With the Worm Wheel 69 and is driven through a pulley 73.

The finishing tracer 33 controls the relative positions of the bloclrand the finishing cutter and, in this instance, is so lconnected tothenishing cutter that the relative adjustment in their movements may beobtained for length grading and Width grading. The Widthl grading may beobtained by mount-- ing the finishing tracer 33 upon a Width gradingslide 4l, the latter being supported by dove tail guides on a guide Way42, which is rigidly mounted on a tracer carriage 43, the latter beingshiftable horizontally on the top vof the frame part l on. guides 44formed on top of the main trame l. The finishing tracer 33 turns aboutan axis at an acute angle to the axis ot turning of the model. The slide4l moves horizontallyat right angles vto the axis ot turning of themodel and carries a dovetailed slidable fulcrum piece 45 which isadjustable vertically relatively to the slide through a screw 46, havinga pinion 47 meshing with a gear 48 on a shaft 49, whichl is turned byacrank 50. rlhis tulcrum piece 45 in turn cooperates with a Swingingmember' or tan board 5l which is pivoted at 52 on the upper trame part2. A spring, not shown, may be used to constantly hold the :tan board incontact with the adjustable :tulcrum- A link 53 pivotally connects tothe'fan board at 54 and also pivotally connects With the swinging frameat 55. The swinging frame is also acted upon by a counterivei'ght 56 onan arm 57 which extends from a rock shaft 53, the latter being providedat opposite ends with arms 59, and links connect these with the arms 3at 61.

From the foregoing, it is apparent that the transverse movement ot theblock l() is controlled through the cooperation between the tracer .33and the model supported on the tail center 13 and the driving dog 14.During the cooperation between the tracer 33 and the model these two)arts partake ot a conjoint movement Whici will impart to the block 10thedesired movement'. The amount ot this conjoint.- movement of thetracer 33 and the model is determined by the position of thefulcruinpiece 45 on the .tan board 5l. It thefulcrum piece 1s opposite -thepivot 52, then the size ot the last. cut,

termed in the art Width grading'mechamsm and will be herein called thefinishing. Y

Width ygrading mechanism.

The machine may also loev provided with What is known as a lengthgrading mechanisin. This comprises, in this instance, a lever 62pivotally mounted as usual on an adjustable fulcrum block (not chown) ona fixed part and also pivotally connected at 62a with the tracercarriage 43. This lengt-h grading lever 62 is, through an adjustablelink 63, pivotally connected at l64 to the cutter carriage 39. The link63 is also pivoted at 65 to a block 65, which s adjustable on thegrading lever 62 toward and from the pivot of the latter 'for thepurpose oi' obtaining length grading for the finishing cutter.

It is apparentthat, it the pivot G5 be shifted to the position oppositethe pivot 62, the movements of the carriages .39 and 43 will be equal.lf the pivot 65 bepositio'ned above the pivot 62a, then Vthe diiferencein movement between the carriages Will be such as to vincrease thelength of the linishcd'last over that of the model. Whereaaif the pivot65 Will be belov.7 Vthe pivot 62a then movements of the carriages 39 and43 will `be such as to decrease the length oi' the tinished last Withreference tothe model.v This length grading mechanism Will. be known, inthis instance, as the finishing length grading mechanism.

The roughing tool or cutter 36 is adapted to operate on the blocksimultaneously with the finishing cutter 35, and to this end, may have aplurality of cutting blades 36H' mounted upon a hollow head Whichlpermits the cutter blades of the finishing cutter to operate therein inthe manner shown in Figs. 3 and 8. The axis ot rotation of this roughingcutter is at an acute angle to the axis ot' rotation ot the block andWiththis end in View the roughing cutter is mounted'upon a shaft of anelectric motor v74, Which is arranged upon a roughing,l cutter carriageguided on guides 76 formed on the finishing cutter carriage 39, the lineot movement` ol" said roughingl cutter' carriage being at an acute angleto the axis oi' rotation of the block and also being;- at an angleto theaxis ot rotation ot the roughing cutter 36. l spring` 75 acts on theroughing cutter carriage 75 to h-old the roughi'ngl cutter toward theWork piece.

A rough Width grading mechanism is interposed between the roughinetracer and the roughing cutter carriage 75. ln this instance, it ispreferred to mal/te the roug'hing` tracer in the torni ot a segment otannulus, the plane ot said segment beine' arranged substantiallyparallel with the plane of rotation oi" the roughing cutter, the segmentbeing` curved transversely to conform to the outermost peripheries of'the cutter blades 36a. rlhe roughing' tracer is mounted on a slide 7?Which is in turn mounted t move on a slide 78, the tvvo slides beingmovable in parallel lines and horizontally. rlhe slide 78 in turn isguided on a standard 79 which is supported on the tracer carriage 4S.rilhe line ort movement ot the tivo slides W and 78 is parallel with theline of movement ot the carriage 75 on which the roughing cutter 36 ismounted. rlhrough a pin 80, projected from the top thereof, the slide T8may be connected With the roughing` cutter carriage 75, the latter tothis end having' an arin Si e5;- tending4 laterally therefrom andprovided With a slot S2 in which the pin 8O operates, this slot beingparallel with the line of movement ot the tracer carriage. Connectionbetween the slide 77 and the slide 78 may be etfected throng-h anadjustable link 83. pivoted at Se to the slide 77 andV at 85 to a block8G Which is adjustable on a rough Width grt-ning arm 87, the latterbeing;` loosely pivoted at 8S to the tracer carriaee 43 and also atV 89to the roughing tracer slice 78, A graduated may be provided on therough Width grading` arm 87 for determinino; the position of theadjustable bloclt 86. l

scale llllhen tue pivot is in line with the pivot 89, the slides 77 and78 move at the saine rate ot speed and, as a. consequence, the roughinecutter and the roug'hing tracer will move together at the saine rate ot'speed toward and from the axis et rotation of the model andthe block.1When the pivot 8531s above the pivot 8i the roughing tracer Se willcause the roughing; cutter 36 to produce a rough width in the blockwhich is greater than that ot tlie'model, Whereas when the pivot 85 isbeloiv the pivot S9 the roughing tracer will cause the roughinn cutterto produce a rough Width in the bloclt'ivhich is less than the Width inthe model rlhe operation ot theinvention will derstood from theforegoing' description, but

it may be summarized as follows: The inodel be un- 1 being; placed in aposition between the d 'iving dogl 14 and the tail center 13, an'l theblock l l() being pla'cecL in position between the driving 'dog l2 andthe tail center ll,`ivith the two cutters and the tivo tracers ceerating respectively with the block and the model at one end of each ot'them, the machine is started in operation. The roughing tracer and therougliing cutter iirst engagev i' spectively the model nd the block, theroughinnj cutter preparing the block in a rough way for operation on bythe finishing cutter which -ollows closely the operation ot' theroughing cutter. As the tivo cutters advance in the direction of theblock, they move relatively to each other, the roughing cutter nearer tothe axis oi' rotation of the block when depression is to be formed, asin Fin'. S, and the finishing cutter nearer to the axis ot' rotation otthe block when a high point isto be 'formed on the block. l

The positions ot the-roughinfg and finishing` cutters are controlledrespectively by the roug'hinn' and the inishing tracer. Owing' to thetact, that the roughing cutter carriage connects with the roufghingl`tracer through a rough Width grading mechanism, it is possible toy causethe roughinrfy cutter to produce' a rough cut of the block which willcorrespoi'id to different Widths ot lasts. rlhe length grading'mechanism for the finishing cutter also acts as a length gradino'mechani An for the roughing cutter,'due to the fact that both cuttersare mounted on one carriage while both tracers are mounted on anothercarriage.

The tracer which controls the roughingr tool or cutter is sli Gghtlylarger iu'diainetcr than the rounjliing cutter or tool as to leave asurplus or" material tor the iinishii iool or cutter to vremoveand tomalte it er ier o set the centers of the tracer Wheels and tools orcutters. It has been found in practico that the la 'er the amount otstock removed by the roug'hingl tool, theinore exact result is'obtainedby the pattern d .this machine permits the Werl: ot' the iiishing toolto be reduced to a minimum. so that more accurate Work is obtained.Furthermore, a smaller amount. ot n Wer is required to operate theViinishino' cutter.

lVhile the invention has been herein described in connection withturningiinaclnne it isapparent that` it is capable ot being'v embodiedin any shapingr macnine Where the shaping action of two tools. cuttersor otherwise, on a Worlr piece is controlled iirom a model. y

'on and desire to g tvfo relaill controlled from a model forlcontrolling the relative adjustment between the tools and also betweena workpiece and the tools.

2. A shaping machine comprising a work piece supporting means, alinishing and a rougliing tool movable relatively to the work piecesupporting means, model support-ing means, and means for controlling therelative positions between the work piece and the two tools from a modelon the model. supporting means, said controlling means having provisionfor effect-ing a relative movement be tween the two tools, so that thefinishing tool cannot hold the roughing tool out ot engagement with thework piece.

3. A shaping machine comprising means for rotating a model about asuitable axis, means tor rotating a work piece about an axis common tothe axis ot turning of the model supporting means, said-work pieceturning means and model 'turning means being ymounted for movementtogether transversely of said axis of rotation, a finishing and aroughing tool movable together in the direction of the axis of rot-ationof the work piece and the model and having a relative movementtransversely of the axis of rotation of the work piece and the model,and two tracers co-operating with the model, one controlling therelative positions-between the work piece and the finishing tool, andt-he other controlling` the relative positions between the work pieceand the roughing tool.

4. A shaping machine comprising a work piece supporting means, modelsupporting means, a roughing tool 'for operating on the work piece, anishing tool for operating on the work piece, andV two tracerscooperating with the model on the model supporting means, one of saidtracers controlling the relative positions between the work piece andthe roughing tool and the other of said tracers controlling the relativepositions between the worli piece and the finishing tool.

5. A shaping machine comprising a means for turning the work about asuitable'axis, means for turning the model about the saine axis, a toolcarriage movable longitudinally of the axis, a finishing and a roughingtool mounted on said carriage and having relative movement on thecarriage transversely oi' said axis, a tracer carriage, a finishing anda roughing tracer relatively mounted on the carriage, thefinisliing'tracer controlling the relative positions between the worl;piece and the 1finishing tool and the roughing tracer controlling thepositions between the work piece and the roughing tool, and a lengthgrading mechanism connecting the tool carriage with the tracer carriage.

Y 6. A shaping machine comprising means for turning a work piece about asuitable axis, means for turning the model about the same axis, a toolcarriage movable longitudinally of said axis, a finishing tool and aroughing tool mounted on the carriage and relatively movabletransversely et said axis, a tracer carriage movable in the direction ofthe axis of rotation ot the-work piece and model, a finishing tracer anda rougliing tracer mounted on the tracer carriage,a length gradingmechanism connecting the tool and thi-:tracerV a common length gradingmechanism con-.

necting the tools with the tracers, a width grading mechanismcontrolling the relative positions between a work piece and thefinishing` tool, and a rough width grading mechanisin controlling therelative positions between the workpiece and the roughing tool.

8. n shaping machine comprising a swing trame, means for rotating a workpiece on said frame, means for rotatably supporting the model on saidframe to rotate about an axis in common with that of thewo'rlr piece, atool carriage movable longitudinally ot the axis of rotation ot the workpiece and the ino-del, a finishing tool and a roughing tool mounted onthe carriage, the rougliing tool being movable on the carriagerelatively to the finishing tool transversely of the axis oi' rotationof the work piece, a tracer carriage movable longitudinally ot the axisof rotation of the model, a finishing tracer and a roughing tracermounted on the tracer carriage movable relatively one to theothertransversely of the axis of rotation of the model, a length gradingmechanism connecting the tool and the tracer cair' e, connecting meansbetween the finishing tracerand the swing frame tor etiecting a relativemovement between the worlr and the iinishing tool, and connecting meansbetween the roughing tracer and the roughing tool for effecting movementof the roughing tool relatively to the finishing tool. y

9. A. shaping machine comprising means for rotating a work piece about asuitable. axis, means for rotating a model about the same axis, amovable frame on which said work piece turning means and model turningmeans are mounted, a tool carriage movableY longitudinally of the axisof rotation oi the model and the work piece, a finishing tool mounted toturn on the carriage about an' axis at an angle other than a right angleto the axiso'f rotation `oi the model, a roughsov ing tool mounted toturn about an axis other than at a right angle to the axis of rotationof the work piece and' having a hollow portion in which a portion of theinishing tool operates, a carriage on which said rougliing tool ismounted to rotate, said carriage being movable oii the tool carriage atan angle other than a right angle to the axis of rotation ot the workpiece, a tracer carriage mov- `able in the direction ot the axis ofrotation or the model, a roughing tracer mounted to move toward and fromthe axis of rotation of the model on a line parallel with the line or'movement of the carriage ot' the roughing tool, a rough width gradingmechanism connecting the roughing tracer with the carriage of theroughing tool, a linisliing tracer movable on the tracer carriagetransversely oic the axis of rotation oit the model, width gradingmechanism connecting said tracer with the trame on which the model andthe work piece are supported, and a length grading mechanism connectingthe tracer kcarriage with the tool carriage.

l0. A shapingmachine comprising means for turning the work about asuitable axis means for turning a model about the same axis, a movabletrame on which said work piece turning means ant model turning means aremounted, a tool carriage, a tracer carriage, length grading meansconnecting the tool carriage with the tracer carriage, means for movingsaid carriages in the direction of the axis of rotation of the workpiece and the model, two relatively movable tools mounted on the toolcarriage, one designed for rough work and the other designed forlinishing work upon those portions of the work piece operated upon bythe ioughing tool, two relatively movable tracers mounted on the tracercarriage, width grading mechanisin connecting one ot the tracers withthe movable traine on which the work piece and the model are mounted,and width grading mechanism connecting the other tracer with the othertool on the tool carriage.

ll. i shaping machine comprising means for turning the woik about asuitable axis, means for turning the model about the same axis, amovable frame on which both of said means are mounted, two relativelymovable tools movable in the direction of the axis or turning oi thework piece, one designed tor rough work and the other designed forfinishing work upon those portions of the work piece operated upon bythe roughing tool, two relatively movable tracers movable in thedirection of the axis ot turning of the model, a connection between oneoi the tracers and one ot the tools for effecting rel# i" ativc movementbetween the tool, and a connection between the other of the tracers, andthe movable trame on which the model and the work piece are supportedfor effecting relative movement between the work piece and both tools. Y

l2. A shaping machine comprising means tor turning the work about asuitable axis, means for turning the model about the-same axis, amovable frame on which both of said means are mounted, two tools movablein the direction ot the axis of turning of the work piece and mounted toturn about different axes both at angles other than right angles'to theaxis of turning of the work piece, one ot said tools having a hollowpoi'- tion in which a portion of the other of said tools operates andhaving also a movement relatively to said other tool transverselyof theaxis or' rotation of the work piece, and two tracers cooperating with amodel on the model supporting means, movable in the direction of theaxis or' rotation of the model and also transversely of said axis ofrota-y tion, one of said tracers being connected with the frame on whichthe medel and the work piece are mounted to effect the movement of thework piece relatively to both tools,v

axis, two tools movable in the direction oliV the axis of turning of thework piece, one of said tools being movable relatively to the other in adirection at an angle other than a right angle to the axis of turning ofthe work piece, and two tracers movable in the direction of the axis ot'turning of the model, one of said tracers being connected to a toolwhich is movable at an angle other than a rightrangle to the axis ofturning of the work piece, and the other of said tracers controlling therelative positions between the work piece and both ot' the tools.

le. A shaping machine comprising means for turning the work about asuitable axis, means for turning the model about a suitable axis, two'tools for operating on a work piece on the work piece turning means,one of said tools being movable relativelyvto the other transversely ofthe axis ofl turning of the work piece, two tracers, one ot whichcontrols the relative position between the two tools and the work piece,and a connection between the other tracer and the tool which is movabletrans\f'ersely of the axis of turning of the work piece.

15. A shaping vmachine comprising means for turning the work about asuitable axis, means for turning the model about a suitable axis, amovable frame on which bothr of said able in the direction of the axisof rotation of said work piece one of which is designed turning meansare mounted, two tools movy for roughening work and t-he other designedtor finishing, the surface traversed by the roughing tool, one of saidtools being movable relatively to the other transversely of the axis `ofrotation, two tracers, one ot which is connected with the trame on whichthe work supporting means and the model supporting means are mounted foreffecting the relative movement between the work piece and the tools, awidth grading mechanism connecting the lother tracerl and the tool whichis movable transversely of the axis ot rotation of the work piece, and alength grading mechanism connecting the two tools and the two tracers.

1 16. A shaping machine comprising means for turning the work aboutsuitable axis, means Afor turning the model about a suitable axis7 aframe on which said work piece turning means and model turning means aremounted, a tool carriage, a tracer carriage, a length grading meansconnecting the tool carriage with the tracer carriage, means movingsaidcarriages in the direction of the axis of rotation ci the work pieceand the model,

" two relatively movable tools mounted on the tool carriage, tworelatively movable tracers mounted on the tracer carriage, width gradingmechanism connecting one of the tracers with the trame on which theworlr piece and 1 the model are mounted, and a width grad-- ingmechanism connecting the other tracer and the other tool and embodying aslide on which said tracer is mounted, a second slide having aconnection with the said tool which permits the Vlength gradingadjustment, a grading arin pivotally connected with the last mentionedslide and having a slidingfulcruni on the tracer carriage, and a linkpivotally connected to the slide on which the tracer is mounted andadjustable on the grading arm in the direction of the length of said armand on opposite sides of the pivotal connection of the latter with thetool.

' 17. A shaping machine comprising means "for turning the work aboutsuitable axis,

means tor turning the model about the. saine axis, a frame on which bothof said means are mounted, a tool carriage and a tracer carriageadjustable in the direction of the axis of turning of the worlt pieceand the model, length grading means connecting said tivo carriages, twotools mounted on said tool carriage, one of said tools having anadjustment relatively to the other transversely oit the axis i ofrotation of the work piece, two tracers tracers is mounted7 a secondslide on which the first named slide is mounted to operate, said secondslide being' adjustable on the tracer carriage in the direction parallelwith Leenaee toward the work, and a secondcutter instru`- mentsimultaneously engaging the same rpiece ot work in inclined relationopposite that of the lirst mentioned cutter instrumenu-one ot saidinstruments serving as a rot-,ghingcutter and the other as a finishingcutter and operative over the same worl; area, one ci. said cutterinstrumentsbeing hollow and the other projected within it so that `theircutting planes intersect permitting their respective points of contactwith the work to approach each other closely and driving means for saidcutters.

l5). A machine for turning irregular objects comprising rotating patternand worl; su aporte, a traveling cutter head moving in a lined path oftravel parallel with the axis or" the work and arranged with its axisinclined to the aXis of the work and at an acute angle with the line oftravel of the cutter head, and a second cutter head traveling in unisonwith the lirst mentioned cutter heath-and simultaneously movabletransversely to the line of travel oi the first cutter and to the axisof the work wherebythe relations between the respective cutters to thework may be difierentiated, said .last mentioned cutter being arranged,in an oppositely inclined'relation with the axis oic the work and lineotl travel, said cutter heads serving as roughing and finishing cuttersoperative over the sameV spcctive cutters and the work is variable fdifferent degree whereby the relation oit the respective cutters andwork may be diilerentiated, the axes olthe roughing and finishing cutterheads being angnlarly arran; in relation with each other and with the as ci the work and direction of relative travel,

21. A machine for turning irregular olijeets having rotating pattern andwork supports, including independent revoluble roughing'V and nisliingcutter heads simultaneously engaging the saine piece of Werl; and operaTtive over the sar e Werl; area, the Werl; cutter heads being relativelymovable in the l direction of travel substantially parallel With theaxis of the Work, the cutter headsbeing relativelyv adjustabletransversely of said direction et' travel during such travelingnievement.

having rotating Werl; and para.' includingI independent revoluble andfinishin g cutter heads simultaneo islyV engaging thesame piece of Werl;and oper over the same Werl; area, said cutter` heads i tating inintersecting planes, means matically adjusting one of said cutters toand from the Werk, independent of the other cut ter bv the coo-v erationet a pattern ca 9 ,l L [i by sai-il pattern sup port, and moans rer ino1 including, vindependent revoluble rouehing i'n heads simultaneouslycn- 'the same piece ot' Werl; and operable over the saine Werl; area,said cutter l vlf" being revoluble in intersecting planes or tion, andrelatively adjustable under automatic control of a pattern.

A machine for turning irregular forms having rotating Werl; and patternsupi erts,

including independent revoluble roughing i and iinishing cutt r an dilinisning cutter heads simultaneously en-v 'Janine' o t: c': over thesE the saine piece of Werl; and operable ne Werl; area, and means fornf' .depenoently controlling 'the operation of the respe J ve cutterheads, by a single pattern, Whei by the respective cutter heads are moreable relative to the Werl; independently of each other. y

26. machine for turning irregular forms having rotating Werl; andpattern supports, including` independent revoluble reughing andfinishing ycutter heads simultaneously engaging the same piece of Werl;and operablev over the same Werl; area, said cutter heads beingangularly disposed and relatively adjustable in relation one With theother, said cutter heads being so constructed and arranged that onecutter may be projected across the plane et rotation of the otheru 2T. Amachine 'for turning irregular forms having rotating Werl; and patternsupports, including independently adjustable revoluble roughing andfinishing cutter heads simule taneously engaging the same piece of Werl;

and operable over the same Werl; area, the axes of rotation ot' thecutter vheads being inclined one to the other and means for relativelyadjusting the cutter heads automatically. i

QS. A machine for turning irregular terms having rotating Werl; andpattern supports, including independent revoluble roughing and finishingcutter heads simultaneously engaging the same'piece of Werl; andoperable over the saine Werl; area, the axes of rotation of the cutterheads being inclined one tothe other, means for independentlycontrolling the relative approach and recession of the cuttersinrelation With the Work, and means for effecting progression of thecutters substantially in unison in relation With the Work.

Q9. In aV machine for turning irregular shane-s, having revoluble Werl;and pattern supports, including a revoluble cutter head in relation WithWhich the Werl; is laterally adjustable7 said cutter head being movablein substantially parallel relation With the axis of the Work, and asecond cutter head operating over die same area traversed by the firstcutter movable in unison With the lateral movement of the Work, but tediierent extent and movable relative to the Workin unison With thetravel of the first cutter said cutters eing arranged With intersectingcircles of operation.

30. In machine for turning irregular shapes having revoluble Werl; andpattern supports, including, tWo independent revoluble cutter heads,t-he Werl; and cutter heads being movable one in relation With theother, in direction et travel substantially parallel With the axis ofthe Work, the Werl; and ene of the cutters being relatively movable enein relation With the other ,transversely to such direction et relativetravel, the Werl; and other cutter being movable in unisontransverselyte said axial direction of relative travel. but to diilerentextent.

8l. In a machine for turning irregular shapes, a reveluble Werl; supportmounted for movement transversely of its aXis of'` rotation, a reughingcutter and a finishing cutter, the Werl; and cutters being relativelymovable in a direction of travel substantially parallel With said axisot' rotation, one 'of the cutters being capable of movement transverselyto path of travel in unison With the transverse ineven'ientof the Work,and means 'for g rverning the approach and recession movements of theWerl; and respective cutters during their relative movement parallelWith the axis of the Work.

32. ln a machine for turning irregular' forms, means for revolublymounting the Werl; and a pattern. tWo cutters simultaneously engageableWith the same piece of Werl; and roperative over the. same Werl; area,said cutters beingrelatively adjustable in relation With each other, andsimultaneously relatively adjustable in relation with the work, andmeans controlled i'rom the pattern for simultaneously varying therelation of the worl' with both the cutters to diillerent extent.

33. ln a machine tor turning irregular forms7 means for revolublymounting the work for movement transversely of its axis oi rotation, acutter movable longitudinallyot the work in relation with which the workis movable by said transverse motion, a pattern engaging meanscontrolling the approach ot' the work toward such cutter, a cuttermember also mounted for movement transversely ot' the axis of rotationol" the workin unison with the movement of the work, and pattern en'-gaging means for governing the relative extent of unison movement of thework and cutter whereby the relation oit the work and cutter will bevaried during such transverse movement, said cutters being operableoverv the saine area of the work, and means 'for et- 'ecting relativetravel ot the worl and critters in a direction substantially parallelwith the axis ot rotation of the work.

34.. A machine for turning irregular forms havingwork and patternrotating means, including a revoluble roughing cutter and revolublelinishing cutter, simultaneously engagingthe same piece ot work injuxtaposed paths ot operation, said cutters being mounted to rotate inintersecting circles ot rotation and automatic means to relatively movesaid cutter heads to vary the over-lapping relation ot their circles ofrotation.

35. A machine for turning irregular forms having work and patternrotating means, includinfY a revoluble roughing cutter and a revoluolefinishing cutter simultaneously enthe same piece of work in juxtaposedpath et operation, one of said cutters being hollow and the other cutterbeing partially projected Within the hollow cutter, said cutters beingrelatively movable to vary such overlapping relation wherein the cuttingplane ci" one cutter angularly intersects the cutting plane ot the othercutter, permitting their respective points of contact with the work toapproach each other closely, automatic control means and driving meansfor said cutters.

Sli. ln a machine for turning irregular shapes, the combination withworlr and pattern rotating means of revoluble roughing cutter and arc'voluble linishing cutter mounted tor simultaneous engagement with thesame piece or work in closely associated paths ot operation, means forrelatively moving the cutters and work in a direction substantiallyparallel with the axis ot rotation of the work, means for relativelyadjusting the cutters and work in a direction transversely in relationwith the axis of rotation of the work, the relative variation ot thework and respective cutters being to different extent during suchtransverse adjustment.

87. ln a machine for turning irregular shapes the combination with workand pat- 38. ln a machine for turning irregular shapes, the combinationwith work and pattern rotating means, of a revoluble roughing cutter anda revoluble linishing cutter mounted for simultaneous engagement withthe same piece of work in closely associated paths ot operation, meansfor relatively moving the cutters and work in a direction substantiallyparallel with the axis of rotation of the work, and means :tordifferentially moving said work and cutters transversely to the axis otrotation oi the work simultane-V ously with their movement parallelthereto` substantially as specified. Y

39. In a machine for turning "irregular shapes, a revoluble work supportcapable of movement to and tro transversely to the axis ot rotation, arevoluble cutter movable in a lixed path of travel substantiallyparallel with the axis ot the work toward and `from which the work ismovable by the to and fro movement of the work support and a secondrevoluble cutter mounted for movement transversely to the axis ofrotation of .the work, a tracer member controlling the trans` versemovement 03": the work supports relative to said cutters and anindependent tracer member controlling the transverse movement.

of the second cutter and following the to and tro movement of the worksupport to eltect a differential relation between the respectivecutters'and between said cutters and the work, and means for also movingthe second cutter longitudinally of the work independ ent of itstransverse movement.

40. In a machine for turning irregular .shapes a revoluble work supportmovable to and tro transversely to its axis'of rotation, a cuttermovable in a fixed path of travel parallel with the axis of the work,vand aseoond cutter member mounted for to and tro movement transverselyto the axis of rotation ot the work and alsomovable longitudinally otthe work, and a guide pattern commento both the cutters and independenttracer members simultaneously engaging the guide pat-A tern and capableof relative movement one to the other determining the relative range ofto and 'liro transverse movements of one cutter in relation with theother and the work relative to both cutters.

al. In a machine for yturning irregular work support simultaneously withthe movement of the latter and a guide pattern common to both tracermembers7 and means for dierentially moving said work and cutter throughtheir to and fro transverse range of movement. 1

42. In a machine for turning irregular shapes, a revoluble work supportmovable to and fro transversely to its axis of rotation,

a relatively fixed cutter member and a cutter member mounted for to andfro movement transversely to the axis of rotation of the work bothcutter members being movable longitudinally of the work and means forsimultaneously moving the work and second cutter toward and from eachother through predetermined degrees of movement as the cutter progresseslongitudinally of the work, including a tracer member controlling themovement of the work and a second independently movable tracer membercontrolling the movement of said second cutter and a guide patterncommon to both tracer members. i

43. In a machine for turning irregular shapes, a revoluble work supportmovable to and fro transversely to its axis of rotation a hollow cuttermember movable in a fixed path substantially parallel with the axis ofthe work and a hollow cutter member projecting partially within thehollow cutter so that their cutting planes intersect and permittingtheir respective points of contact with the work to approach each other,said hollow cutter being mounted for to and fro movement transversely tothe axis of rotation of the work and also movable longitudinally of thework, independent tracer members, one of which is movable relative tothe other controlling the to and fro movement of ithe work support andthe to and fro movementof the hollow cutter relative to the movable workand a guidev pattern common vto both of the tracer members.

4:4. In a wood Working machine and the like, work support, and a pair ofrevoluble cutters associated therewith, for simultaneous engagement withthe work, onev of the cutters being hollow,the second cutter projectingwithin the hollowof the other cutter,- substantially as specified.

45. In a wood working machine and the like, the combination with a worksupport of a pair of independently revoluble cutters for simultaneousengagement with the work rotating in angularlyj disposed planes, one ofthe cutters being hollow, and the other cutter intersecting theplane ofrotation of the hollow cutter, substantially as specified.

46. In combination in a machine for turning irregular forms, two cutterinstruments operating over the same area of the Work, i

'control mechanism therefor and between which cutters and their controlmechanism and the work there is a proportionate shifting to control thesize of reproduction in which one cutter is fixed and the cooperatingmechanism and work shift laterally thereto while the other cutter shiftswith reference to the work and control, whereby the vrelations betweenthe respective cutters tothe work may be differentiated.

47. In a machine for turning irregular objects, the combination withrotating pattern andwork supports, of a traveling rotating cutter headarranged with its axis oblique to the axis of the work holder andinclined toward the work and with the line,4

of feed, and a second cutter head also arranged with its axis oblique tothe axisV of the work and inclined toward the work on a directioncontrary to the line Vof feed, one of said cutter heads being hollow andthe other projected Within it so that their cutting planes intersectpermitting their respective points of contact with the work to approacheach other closely, control mechanism therefor and between which cuttersand their control mechanism and the work there is a proportionate shiftto'control the size of reproduction one of said cutters being confinedto a fixed path of travel and the cooperating control mechanism and worklaterally shift relative thereto while the other cutter shifts withreference to the work and control whereby the relation of the respectivecutters tothe work may be differentiated.

STANLEY E. BOYNTON.

